Efreecity Joystick Keyboard Controller PTZ Control Keyboard Support for Sony Video System Camera RS485 LCD Display Specially design for SONY video conference camera, completely compatible with VISCA protocol Can set the address code of SONY video conference camera independently Refurbish the program on line, compile corresponding promotion program according to the protocol and command provided by customer, customer connect keyboard controller through RS485 interface on the computer to update firmware Unique control code learning function, customer can revise the control code command voluntarily Control the rotation of speed dome camera and swinging angle of joystick with nonpolar variable speed control to embody speed dome cameras rotating speed real-time.